<template>
  <div class="upload-container">
    <el-button
      :style="{background:color,borderColor:color}"
      icon="el-icon-upload"
      size="mini"
      type="primary"
      @click=" dialogVisible=true"
    >upload</el-button>
    <el-dialog :visible.sync="dialogVisible">
      <el-upload
        :multiple="true"
        :file-list="fileList"
        :show-file-list="true"
        :on-remove="handleRemove"
        :http-request="set_upload_param"
        :before-upload="beforeUpload"
        :on-success="handleSuccess"
        class="editor-slide-upload"
        :action="upload.url"
        :headers="upload.headers"
        list-type="picture-card"
      >
        <el-button id="upload" size="small" type="primary">Click upload</el-button>
      </el-upload>
      <el-button @click="dialogVisible = false">Cancel</el-button>
      <el-button type="primary" @click="handleSubmit">Confirm</el-button>
    </el-dialog>
  </div>
</template>

<script>
// import { getToken } from 'api/qiniu'
import { upload } from '@/utils/auth'
import { getFileToken } from '@/api/general/file'
import axios from 'axios'

export default {
  name: 'EditorSlideUpload',
  props: {
    color: {
      type: String,
      default: '#1890ff'
    }
  },
  data() {
    return {
      upload: upload,
      dialogVisible: false,
      listObj: {},
      fileList: [],
      UploadObj: [],
      customColor: '',
      percentage: 0,
      plUploader: null,
      token: {}
    }
  },
  mounted() {
    this.gettoken()
  },
  methods: {
    random_string(len) {
      len = len || 32
      const chars = 'ABCDEFGHJKMNPQRSTWXYZabcdefhijkmnprstwxyz2345678'
      const maxPos = chars.length
      let pwd = ''
      for (let i = 0; i < len; i++) {
        pwd += chars.charAt(Math.floor(Math.random() * maxPos))
      }
      return pwd
    },
    set_upload_param(param) {
      const { file } = param
      const formData = new FormData()
      formData.append('name', file.name)
      const g_object_name = this.random_string(10)
      formData.append('key', `${this.token.dir}${g_object_name}`)
      formData.append('policy', this.token.policy)
      formData.append('OSSAccessKeyId', this.token.accessid)
      formData.append('success_action_status', 200)
      formData.append('callback', this.token.callback)
      formData.append('signature', this.token.signature)
      formData.append('file', file)
      axios.post(this.token.host, formData,
        {
          onUploadProgress: p => {
            param.file.percent = 100 * (p.loaded / p.total)
            param.onProgress(param.file)
          }
        })
        .then(response => {
          param.onSuccess(response)
        })
        .catch((error) => {
          console.log(error)
        })
    },
    gettoken() {
      const dir = 'elec/'
      return new Promise((resolve, reject) => {
        getFileToken({ dir }).then(result => {
          this.token = result.data
          resolve(result.data)
        })
      })
    },
    checkAllSuccess() {
      return Object.keys(this.listObj).every(item => this.listObj[item].hasSuccess)
    },
    handleSubmit() {
      const arr = Object.keys(this.listObj).map(v => this.listObj[v])
      if (!this.checkAllSuccess()) {
        this.$message('Please wait for all images to be uploaded successfully. If there is a network problem, please refresh the page and upload again!')
        return
      }
      this.$emit('successCBK', arr)
      this.listObj = {}
      this.fileList = []
      this.dialogVisible = false
    },
    handleSuccess(response, file) {
      const uid = file.uid
      const objKeyArr = Object.keys(this.listObj)
      for (let i = 0, len = objKeyArr.length; i < len; i++) {
        if (this.listObj[objKeyArr[i]].uid === uid) {
          this.listObj[objKeyArr[i]].url = response.data.fileUrl
          this.listObj[objKeyArr[i]].hasSuccess = true
          return
        }
      }
    },
    handleRemove(file) {
      const uid = file.uid
      const objKeyArr = Object.keys(this.listObj)
      for (let i = 0, len = objKeyArr.length; i < len; i++) {
        if (this.listObj[objKeyArr[i]].uid === uid) {
          delete this.listObj[objKeyArr[i]]
          return
        }
      }
    },
    beforeUpload(file) {
      const _self = this
      const _URL = window.URL || window.webkitURL
      const fileName = file.uid
      this.listObj[fileName] = {}
      return new Promise((resolve, reject) => {
        const img = new Image()
        img.src = _URL.createObjectURL(file)
        img.onload = function() {
          _self.listObj[fileName] = { hasSuccess: false, uid: file.uid, width: this.width, height: this.height }
        }
        resolve(true)
      })
    }
  }
}
</script>

<style lang="scss" scoped>
.editor-slide-upload {
  margin-bottom: 20px;
  /deep/ .el-upload--picture-card {
    width: 100%;
  }
}
</style>
